918809461 has 2 divisors, whose sum is σ = 918809462. Its totient is φ = 918809460.

The previous prime is 918809459. The next prime is 918809483. The reversal of 918809461 is 164908819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 839260900 + 79548561 = 28970^2 + 8919^2 .

It is a cyclic number.

It is not a de Polignac number, because 918809461 - 2¹ = 918809459 is a prime.

It is a super-2 number, since 2×918809461² = 1688421651246221042, which contains 22 as substring.

Together with 918809459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918809491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459404730 + 459404731.

It is an arithmetic number, because the mean of its divisors is an integer number (459404731).

Almost surely, 2^918809461 is an apocalyptic number.

It is an amenable number.

918809461 is a deficient number, since it is larger than the sum of its proper divisors (1).

918809461 is an equidigital number, since it uses as much as digits as its factorization.

918809461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 918809461 is about 30311.8699687103. The cubic root of 918809461 is about 972.1691143508.

The spelling of 918809461 in words is "nine hundred eighteen million, eight hundred nine thousand, four hundred sixty-one".